5 a.The following is a statement of the results of a hypothesis test (a T test). Which number is the degrees of freedom?

Group A had a mean score of 3.4 and a SD of 1, and group B had a mean score of 2.3 and an SD of 1.5. An independent

samples T test yielded T (34) = 2.19, p = .02, d = .66.

a..66

b.32

c.the dfis not given in the statement.

d.34

b. A researcher conducts a related measures T test and gets a value ofM_D= 4,with a sample size of n=11 and a T value of -3.

If the researcher measures effect size using the percentage of variance accounted for, what value will be obtained for r²?

a.-9/19

b.9/20

c.9/19

d.it is not possible to have a negative value for T

c. For a research study comparing two treatment conditions, a repeated-measures design would require one score for each participant but an independent-measures design would require two scores for each participant.

True

False

d. If a researcher is conducting a two independent samples t test, what information is needed from the population to calculate the t statistic?

a.The t statistic does not require any information about the population

b.You must know the population mean and the variance or standard deviation

c.You must know the population mean

d.You must know the population variance or standard deviation